VM server storage space expansion to improve the Server performance.

Problem Description:

My virtual server C:\(os drive) is running out of space, only 10% free. I need to expand the c: space capacity.
I checked the VM Edit settings in the Vcenter, I found that, this VM is having 1 virutual hard disk. this virtual
hard disk is partitioned as C:\ for OS and D:\ for the page file.
now please help me how can I expand the C:\ space?

It would be much better and recommended to STOP using partitions, and create a new virtual disk, move the pagefile to this new disk, and then delete the D: volume, and then Expand the C: using tools in my article to expand the C: volume.